Organisation for Economic Co-operation and Development. (1990). OECD economic surveys: Belgium - Luxembourg. Organisation for Economic Co-operation and Development.
Chicago-referens (17:e uppl.)Organisation for Economic Co-operation and Development. OECD Economic Surveys: Belgium - Luxembourg. Paris, France: Organisation for Economic Co-operation and Development, 1990.
MLA-referens (9:e uppl.)Organisation for Economic Co-operation and Development. OECD Economic Surveys: Belgium - Luxembourg. Organisation for Economic Co-operation and Development, 1990.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.